mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 13:23:51 +00:00
7bebc1c497
Inherit from FilterDataSetWithField and implemented a trivial DoMapField whcih just return fales.
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_filter_particle_density_base_h
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#define vtk_m_filter_particle_density_base_h
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#include <vtkm/filter/FilterDataSetWithField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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namespace vtkm
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{
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namespace filter
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{
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// We only need the CoordinateSystem and scalar fields of the input dataset thus a FilterField
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template <typename Derived>
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class ParticleDensityBase : public vtkm::filter::FilterDataSetWithField<Derived>
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{
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public:
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// deposit scalar field associated with particles, e.g. mass/charge to mesh cells
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using SupportedTypes = vtkm::TypeListFieldScalar;
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protected:
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ParticleDensityBase(const vtkm::Id3& dimension,
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const vtkm::Vec3f& origin,
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const vtkm::Vec3f& spacing)
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: Dimension(dimension)
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, Origin(origin)
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, Spacing(spacing)
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, ComputeNumberDensity(false)
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, DivideByVolume(true)
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{
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}
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ParticleDensityBase(const vtkm::Id3& dimension, const vtkm::Bounds& bounds)
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: Dimension(dimension)
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, Origin({ static_cast<vtkm::FloatDefault>(bounds.X.Min),
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static_cast<vtkm::FloatDefault>(bounds.Y.Min),
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static_cast<vtkm::FloatDefault>(bounds.Z.Min) })
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, Spacing(vtkm::Vec3f{ static_cast<vtkm::FloatDefault>(bounds.X.Length()),
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static_cast<vtkm::FloatDefault>(bounds.Y.Length()),
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static_cast<vtkm::FloatDefault>(bounds.Z.Length()) } /
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Dimension)
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, ComputeNumberDensity(false)
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, DivideByVolume(true)
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{
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}
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public:
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template <typename DerivedPolicy>
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VTKM_CONT vtkm::cont::DataSet PrepareForExecution(const vtkm::cont::DataSet& input,
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vtkm::filter::PolicyBase<DerivedPolicy> policy)
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{
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if (this->ComputeNumberDensity)
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{
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return static_cast<Derived*>(this)->DoExecute(
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input,
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vtkm::cont::make_ArrayHandleConstant(vtkm::FloatDefault{ 1 }, input.GetNumberOfPoints()),
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vtkm::filter::FieldMetadata{}, // Ignored
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policy);
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}
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else
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{
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return this->FilterDataSetWithField<Derived>::PrepareForExecution(input, policy);
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}
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}
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template <typename T, typename StorageType, typename Policy>
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VTKM_CONT bool DoMapField(vtkm::cont::DataSet&,
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const vtkm::cont::ArrayHandle<T, StorageType>&,
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const vtkm::filter::FieldMetadata&,
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vtkm::filter::PolicyBase<Policy>)
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{
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return false;
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}
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VTKM_CONT void SetComputeNumberDensity(bool yes) { this->ComputeNumberDensity = yes; }
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VTKM_CONT bool GetComputeNumberDensity() const { return this->ComputeNumberDensity; }
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VTKM_CONT void SetDivideByVolume(bool yes) { this->DivideByVolume = yes; }
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VTKM_CONT bool GetDivideByVolume() const { return this->DivideByVolume; }
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protected:
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vtkm::Id3 Dimension; // Cell dimension
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vtkm::Vec3f Origin;
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vtkm::Vec3f Spacing;
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bool ComputeNumberDensity;
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bool DivideByVolume;
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public:
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// conceptually protected but CUDA needs this to be public
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class DivideByVolumeWorklet : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldInOut field);
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using ExecutionSignature = void(_1);
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VTKM_EXEC_CONT
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explicit DivideByVolumeWorklet(vtkm::Float64 volume)
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: Volume(volume)
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{
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}
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template <typename T>
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VTKM_EXEC void operator()(T& value) const
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{
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value = static_cast<T>(value / Volume);
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}
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private:
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vtkm::Float64 Volume;
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}; // class DivideByVolumeWorklet
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};
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}
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}
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#endif //vtk_m_filter_particle_density_base_h
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